Inert mineral pigments that absorb/reflect visible light (400–700 nm) — the wavelength band UV filters miss. In tinted sunscreens they are the key adjunct for melasma and PIH, where visible light is an independent trigger.
The research
Iron Oxides is a pigment backed by a moderate body of supporting evidence (evidence tier 2 of 4). We track 6 studies for it, 5 reporting a positive effect.
Journal of the American Academy of Dermatology · 2015 · rct · n=40
Randomized controlled trial (n=40, 26 weeks): PIVOTAL replication study: identical UV filters with and without iron oxide tinting; median MASI increase from baseline to month 6 higher for non tinted 2.43 vs tinted 0.45 p=0.027; first RCT specifically for relapse prevention.
Journal of Drugs in Dermatology · 2020 · observational
Clinical study: Demonstrates iron oxide containing formulations at 4.85% and 27.25% significantly protect against VL induced pigmentation compared to non tinted mineral SPF50 in skin of color; key evidence for Fitzpatrick IV to VI indication.
Photodermatology, Photoimmunology & Photomedicine · 2013 · rct · n=68
Randomized controlled trial (n=68, 8 weeks): PIVOTAL study demonstrating UV VL sunscreen with iron oxide superiority over UV only sunscreen for melasma treatment; both arms received 4% hydroquinone; UV VL arm showed greater MASI improvement colorimetric improvement and melanin reduction; established VL role in melasma pathogenesis.
Journal of Investigative Dermatology · 2018 · in vitro
In-vitro/mechanistic study: Mechanistic identification of opsin 3 as the melanocyte blue light sensor driving VL induced pigmentation; explains why short wavelength VL protection via iron oxides is effective.
Review: Review establishing VL role in pigmentation and ROS generation.
Products with Iron Oxides
In 654 products — most often serums (240), sunscreens (171), moisturizers (155), from $5.00 to $1115.62. Set up a profile to rank these for your skin. Click any product to learn more.
Caudalie Premier Cru Skin Barrier Rich Refillable Moisturiser with Bio-Ceramides 50ml is a antioxidant serum by Caudalie. Key ingredients include Glycerin, Caprylic/Capric Triglyceride, Cetearyl Alcohol.
May aggravate: Perioral Dermatitis (Fragrance); Psoriasis (Fragrance); Melasma (Fragrance)
Sol de Janeiro Glowmotions Copacabana Bronze Glow Oil 75ml is a antioxidant serum by Sol de Janeiro. Key ingredients include Mica, Fragrance, Coconut Oil.
Caudalie Premier Cru Anti-Aging Eye Cream for Fine Lines and Wrinkles 15ml is a eye cream by Caudalie. Key ingredients include Mica, Coco-Caprylate/Caprate, Ethylhexyl Stearate.
May aggravate: Seborrheic Dermatitis (Ethylhexyl Palmitate)
Laura Mercier Translucent Loose Setting Powder 29g (Various Shades) Translucent is a skincare product by Laura Mercier. Key ingredients include Talc, Caprylic/Capric Triglyceride, Ethylhexyl Palmitate.